Cita APA (7th ed.)

Del Prado, M. G. (1981). Ibalon: Ethnohistory of the Bikol Region. AMS Press.

Cita Chicago (17th ed.)

Del Prado, Mariano Goyena. Ibalon: Ethnohistory of the Bikol Region. Legazpi City: AMS Press, 1981.

Cita MLA (9th ed.)

Del Prado, Mariano Goyena. Ibalon: Ethnohistory of the Bikol Region. AMS Press, 1981.